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Bad reasoning as well as good reasoning is possible and this fact is the foundation of the practical side of logic.

Charles Sanders Peirce

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Charles Sanders Peirce
Age: 74 †
Born: 1839
Born: September 10
Died: 1914
Died: April 19
Geodesist
Linguist
Logician
Mathematician
Philosopher
Pragmatist
Statistician
University Teacher
Phillips Place
Cambridge
Massachusetts
Charles Peirce
Charles S. Peirce
Charles Sanders Santiago Peirce
CSP
Well
Logic
Good
Foundation
Side
Sides
Possible
Fact
Reasoning
Facts
Practicals
Wells
Practical

More quotes by Charles Sanders Peirce

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All the progress we have made in philosophy ... is the result of that methodical skepticism which is the element of human freedom.
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The pragmatist knows that doubt is an art which hs to be acquired with difficulty.
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The method of authority will always govern the mass of mankind and those who wield the various forms of organized force in the state will never be convinced that dangerous reasoning ought not to be suppressed in some way.
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The entire universe is perfused with signs, if it is not composed exclusively of signs.
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Generality is, indeed, an indispensable ingredient of reality for mere individual existence or actuality without any regularity whatever is a nullity. Chaos is pure nothing.
Charles Sanders Peirce
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It is not knowing, but the love of learning, that characterizes the scientific man.
Charles Sanders Peirce
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A quality is something capable of being completely embodied. A law never can be embodied in its character as a law except by determining a habit. A quality is how something may or might have been. A law is how an endless future must continue to be.
Charles Sanders Peirce
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Our whole past experience is continually in our consciousness, though most of it sunk to a great depth of dimness. I think of consciousness as a bottomless lake, whose waters seem transparent, yet into which we can clearly see but a little way.
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A true proposition is a proposition belief which would never lead to such disappointment so long as the proposition is not understood otherwise than it was intended.
Charles Sanders Peirce
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The idea does not belong to the soul it is the soul that belongs to the idea.
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All the greatest achievements of mind have been beyond the power of unaided individuals.
Charles Sanders Peirce
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The essence of belief is the establishment of a habit.
Charles Sanders Peirce
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If man were immortal he could be perfectly sure of seeing the day when everything in which he had trusted should betray his trust, and, in short, of coming eventually to hopeless misery. He would break down, at last, as every good fortune, as every dynasty, as every civilization does. In place of this we have death.
Charles Sanders Peirce
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One will meet, for example, the virtual assumption that what is relative to thought cannot be real. But why not, exactly? Red is relative to sight, but the fact that this or that is in that relation to vision that we call being red is not itself relative to sight it is a real fact.
Charles Sanders Peirce
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Some think to avoid the influence of metaphysical errors, by paying no attention to metaphysics but experience shows that these men beyond all others are held in an iron vice of metaphysical theory, because by theories that they have never called in question.
Charles Sanders Peirce
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We shall do better to abandon the whole attempt to learn the truthunless we can trust to the human mind's having such a powerof guessing right that before very many hypotheses shall have been tried, intelligent guessing may be expected to lead us to one which will support all tests, leaving the vast majority of possible hypotheses unexamined.
Charles Sanders Peirce
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Every new concept first comes to the mind in a judgment.
Charles Sanders Peirce
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Mere imagination would indeed be mere trifling only no imagination is mere .
Charles Sanders Peirce
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Another characteristic of mathematical thought is that it can have no success where it cannot generalize.
Charles Sanders Peirce
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Whenever a man acts purposively, he acts under a belief in some experimental phenomenon. Consequently, the sum of the experimental phenomena that a proposition implies makes up its entire bearing upon human conduct.
Charles Sanders Peirce